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2013  (Vol. 1, No: 2) 

Reduction of Contaminates from Ocean Water


Solomon Ali, Omprakash Sahu

Corresponding Author: Solomon Ali

Vol. 1, (2): 19-25

Abstract

Water is key parameter for the life and the main source of water is ocean in the Earth. Ocean water contained different element, salts, organic and organic compound. If the percentage of composition can be reduced up to limit, it can be used for drinking purpose. The main goal of this study to reduced the hardness, oil and pathogen from the ocean water for better use. Adsorption method was applied to treat the ocean water with the coastal clay. It shown better efficiency at 6 to 8 pH, 4h contact time, 6gm of dosing and heat the clay up to 600C.


Submitted
 Accepted
24 Mar 2014
29 Apr 2014
 

Mohammad Sameti, Elham Farahi

Corresponding Author: Mohammad Sameti

Vol. 1, (2): 27-34

Abstract

Research in different types of ocean energy including wave energy, tidal energy, ocean thermal, ocean currents, salinity gradients and ocean biomass has led to promising technologies and in some cases commercial deployment. Ocean energy extractors can be integrated into coastal structures: one of the device is the oscillating water column (OWC), which has so far been used on shore and proposed for floating plants. Oscillating water column wave energy conversion devices consist of a partially submerged chamber open to incident wave. The ocean waves cause the water column inside the chamber to rise and fall, driving the air in and out of the chamber which in turn drives a turbo-generator. In this paper, an analytical model was proposed for an OWC wave energy converter and formulas were proposed for its output power and overall efficiency. The optimum values were found for both the power and efficiency.

Submitted
Accepted
07 Apr 2014 
01 May 2014
 

K. Asadi, C. Ershadi, M. Hadipour

Corresponding Author: K. Asadi

Vol. 1, (2): 35-51


Abstract

In this paper commercial code FLUENT is used to validate and compare the numerical and experimental results of an investigation of the near-bed flow patterns, the bed shear stress amplification and scour around the head of a vertical-wall breakwater, using regular waves. The Keulegan-Carpenter number (KC), based on the diameter of the breakwater head, is confirmed to be the major parameter that governs the flow and the equilibrium scour depth, same as the result obtained from experimental tests. Basic flow structures are identified as function of KC and visualized in these simulations. The scour depth is confirmed to increase with increasing the Keulegan-Carpenter number. Also, the effects of head shape and the presence of a co-directional current are investigated. The numerical results indicate that the scour depth is increased considerably in the presence of a current, in agreement with experimental results. Likewise, the scour depth is increased when the head shape is changed from a round shape to a sharp-edged one.

Submitted
Accepted
31 Jan 2014 
12 Apr 2014